I very rarely came across rude or disrespectful people. I don't know how I slipped by all of them, but I honestly can't think of one experience off the top of my head that was like that. I'm sure they're there, but I'd have to think really hard to recall them.
I do like the idea of pulling in different producers to get new perspectives. That's what I did with Vows and I feel it just gives variety and makes for a more exciting journey for the listener.
The aim and final end of all music should be none other than the glory of God and the refreshment of the soul.